Multiple-drilling machine



(No Model.)

' G. T. PARRY.

, MULTIPLE DRILLING MACHINE.

No.257,06l. 4 PatentedApr.25,1882.

um annulus. I i 1 ,u

( WW I v UNITE STATES PATENT twice.

CHARLES T. PARRY, OF PHILADELPHIA, PENNSYLVANIA.

MULTIPLE-DRILLING MACHINE.

SPECIFICATION forming partof Letters Patent No. 257,061, dated April 25,1882.

' Application filed September 17, 1881. (No model.)

To all whom it may concern:

Be it known that LUHARLEs T. PARRY, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Multiple-Drilling Machines, of which the following is aspecification.

The objectof my invention is to drill a series of holes at exactly equaldistances apart from each other, and to readily and accurately adjustthe drill-carriers for boring a succession of holes without resorting tothe usual tedious plan of marking out the position of the holes in theobject to be drilled and shifting said object after each boring.

1n the accompanying drawings, Figure 1 is a front View of my improvedmultiple-drilling machine; Fig. 2, a transverse vertical section on theline 1 2; Fig. 3, a perspective view of the finger or pointer, referredto hereinafter; and Fig. 4, views of the rest and clamp-plate forconfining the object to be drilled to a faceplate.

The frame-work of the machine consists in the present instance of thetwo standards A A, connected together at or near the base and near thetop bythe horizontal guide-bar A, which must 'in all cases be secured toor form part of the frame, although the latter may be otherwise variedin construction without departingfrom the main features of my invention.

To the guide-bar A is adapted a carriage or saddle, B, in the mannershown in Fig. 2, and on this saddle, preferably near one end of thesame, is a hearing or bearings, a, for a shaft, 1), which is providedwith a suitable handle, 0, and carries a pinion, d, gearing into a rack,e, on the guide-bar, so that by turning the handle the saddle can betraversed to and fro on the said bar. Although I prefer thisrack-andpinion arrangement, other appliances-a screw, for instance-mightbe used for traversing the saddle. To the front of this saddle areadapted a number of drill-spindle carriers, E--five in the presentinstance--in such a manner that each carrier can be adjustedhorizontally on the saddle independently of the others and secured afteradjustment. For this purpose I prefer to form in the saddle twolongitudinal T-shaped grooves f f, for receiving the T- dle byprojections entering the grooves. The

saddle carries an adjustable finger or pointer, H, referred tohereinafter.

It has not been deemed necessary to illustrate or describe mechanism fordriving and leeding the drill-spindles G of the carriers E, as differentwell-known contrivances, common to other drilling-machines, may beadopted for this purpose. It is not essential, moreover, that thedrill-spindles should be combined with mechanism for feeding the same,as the work to be operated on may be fedto the drills.

While the machine may-be used for drilling a number of holes indifferent objects, it has been especially designed for boring holesthrough the edges of water-space frames of steam-boilers of thelocomotive type, a number of holes at uniform distances apart beingdemanded for the rivets which secure to the frame the platesconstituting the inner and outer shells of the fire-box.

A face-plate, I, is secured to the front of the frame A, and thisface-plate has a T-groote for receiving the T-heads of bolts m, eachbolt passing through a supporting-block or rest, a, and through aclamping-plate, p, a projection or rib at the back of the block enteringthe groove in the face-plate. (See Fig. 4.)

The water-space frame K is placed on the blocks-of which there are threein the present instanceand the nuts of the bolts on are tightened, so asto firmly confine the frame to the face-plate. In thus securing thewater-space frame to the face-plate no adjustment is necessary, theblocks or rests determining the proper position of the frame prior tothe drilling of the holes in the same. The distance between therivet-holes having been determined, a scale, J, is selected tocorrespond therewith, the scale being made on the face of the guidebarA; or a detachable scale may be let into a recess in the face of thebaraud there secured. The drill-spindle carriers are adjusted onthesaddle to accord with the scale, the distance between the centers ofthe spindles being an exact multiple of the divisions on the scale.After the carriers have been thus adjusted the machine is ready toreceive the work, which in the present instance is the said water-spaceframe K, and which is applied and secured to the face-plate in themanner described above. The position of the first hole in the framehaving been determined by a center punch-mark, the saddle is moved alongthe guide-bar until an end drill of the seriesthe end drill on theright, for instancecoincides with the center punch-mark, when thepointer H is adjusted to coincide with one of the division -lines of thescale and secured after adjustment." The drills are now set in motion,and after the first series of holes has been completed the saddle B ismoved forwardnntil the pointer H coincides with the next division of thescale, when another series of holes is drilled, and so on until thedesired number of holes at the same distance apart as the divisions onthe scale have been bored through one bar of the water-space frame, whenthelatter is detached from the face-plate and readju ted thereto forboring; the desired holes in :nother bar of the frame.

l t-laim as my intention- 1. The combination, in amultiple drillingmachine, of a guide-bar, a saddle adapted to the same, and mechanism fortraversing the said saddle, with a series of drill-spindle carrierssecured to the saddle so as to be adjustable thereon independently ofeach other and in the same direction as that in which the said saddle istraversed, all substantially as set forth.

2. The combination, in a multiple-drilling machine, of a fixedguide-bar, a saddle adapted thereto, mechanism for traversing the same,and a series of drill-spindle carriers adj ustably secured to thesaddle, With an adjustable pointer on'the-latter and a scale on theguidebar, all substantially as set forth.

3. The combination, in a multiple-drilling machine, of a series ofadjustable drill-spindle carriers, with a faceplate, I, rests a,adjustable thereon, and clamps for confining the object to be drilled,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence oi'two subscribing witnesses.

CHAS. T. PARRY.

WVitnesses:

HARRY DRURY, HARRY SMITH.

